Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions

Table 3

The intrasession and intersession repeatability of the estimated ocular aberration using the pupil scaling-down method.

Parameters	Process	Average	Intrasession difference		Difference/average (%)	95% LOA	ICC
Total RMS	Session 1	2.93 ± 1.14	0.06	0.565	2.05	[−1.28, 1.40]	0.839
	Session 2	2.78 ± 1.09	−0.25	0.015	8.99	[−1.57, 1.07]	0.829
	Intersession	2.85 ± 1.07	−0.15	0.109	5.26	[−1.39, 1.09]	0.847
LOA total RMS	Session 1	2.83 ± 1.17	0.10	0.502	3.53	[−1.94, 2.14]	0.678
	Session 2	2.66 ± 1.16	−0.27	0.069	10.15	[−2.19, 1.65]	0.707
	Intersession	2.74 ± 1.11	−0.17	0.137	6.20	[−1.65, 1.31]	0.798
HOA total RMS	Session 1	0.25 ± 0.15	−0.04	0.866	16.00	[−0.32, 0.24]	0.638
	Session 2	0.23 ± 0.11	−0.16	0.010	69.57	[−0.34, 0.02]	0.739
	Intersession	0.24 ± 0.12	−0.15	0.170	62.50	[−0.31, 0.01]	0.804
Defocus	Session 1	2.78 ± 1.13	0.02	0.785	0.72	[−1.94, 1.98]	0.685
	Session 2	2.58 ± 1.14	−0.06	0.248	2.33	[−2.22, 2.10]	0.633
	Intersession	2.68 ± 1.07	−0.07	0.097	2.61	[−1.61, 1.47]	0.771
Astigmatism	Session 1	0.47 ± 0.34	0.00	0.485	0.00	[−0.36, 0.36]	0.872
	Session 2	0.43 ± 0.29	−0.04	0.029	9.30	[−0.38, 0.30]	0.849
	Intersession	0.45 ± 0.31	−0.02	0.145	4.44	[−0.34, 0.30]	0.873
Coma	Session 1	0.17 ± 0.11	0.01	0.378	5.88	[−0.17, 0.19]	0.713
	Session 2	0.17 ± 0.09	−0.02	0.128	11.76	[−0.18, 0.14]	0.723
	Intersession	0.17 ± 0.10	0.00	0.699	0.00	[−0.16, 0.16]	0.682
Trefoil	Session 1	0.11 ± 0.07	0.00	0.914	0.00	[−0.14, 0.14]	0.581
	Session 2	0.12 ± 0.10	−0.02	0.159	16.67	[−0.22, 0.18]	0.252
	Intersession	0.12 ± 0.07	0.01	0.555	8.33	[−0.19, 0.21]	0.262
Spherical	Session 1	0.06 ± 0.05	0.02	0.029	33.33	[−0.08, 0.12]	0.549
	Session 2	0.06 ± 0.05	−0.01	0.224	16.67	[−0.11, 0.09]	0.570
	Intersession	0.06 ± 0.04	0.00	0.730	0.00	[−0.08, 0.08]	0.618
Secondary	Session 1	0.05 ± 0.03	0.00	0.977	0.00	[−0.08, 0.08]	0.570
	Session 2	0.05 ± 0.03	−0.01	0.129	20.00	[−0.09, 0.07]	0.484
	Intersession	0.05 ± 0.03	0.00	0.275	0.00	[−0.06, 0.06]	0.619
MTF@5cpd	Session 1	0.60 ± 0.20	−0.01	0.478	1.67	[−0.27, 0.25]	0.810
	Session 2	0.60 ± 0.18	0.05	0.015	8.33	[−0.19, 0.29]	0.797
	Intersession	0.60 ± 0.19	0.00	0.994	0.00	[−0.14, 0.14]	0.925
MTF@10cpd	Session 1	0.33 ± 0.16	−0.03	0.071	9.09	[−0.27, 0.21]	0.743
	Session 2	0.31 ± 0.15	0.03	0.096	9.68	[−0.23, 0.29]	0.694
	Intersession	0.32 ± 0.15	−0.01	0.314	3.13	[−0.21, 0.19]	0.818
MTF@15cpd	Session 1	0.21 ± 0.11	−0.03	0.033	14.29	[−0.23, 0.17]	0.680
	Session 2	0.21 ± 0.12	0.03	0.234	14.29	[−0.33, 0.39]	0.275
	Intersession	0.21 ± 0.10	0.00	0.997	0.00	[−0.22, 0.22]	0.563
MTF@20cpd	Session 1	0.15 ± 0.08	−0.02	0.076	13.33	[−0.18, 0.14]	0.538
	Session 2	0.15 ± 0.08	0.01	0.341	6.67	[−0.15, 0.17]	0.599
	Intersession	0.15 ± 0.07	−0.01	0.460	6.67	[−0.13, 0.11]	0.698
MTF@25cpd	Session 1	0.12 ± 0.06	−0.02	0.121	16.67	[−0.14, 0.10]	0.555
	Session 2	0.11 ± 0.06	0.01	0.048	9.09	[−0.09, 0.11]	0.698
	Intersession	0.11 ± 0.06	−0.01	0.230	9.09	[−0.09, 0.07]	0.793
MTF@30cpd	Session 1	0.10 ± 0.05	−0.01	0.240	10.00	[−0.11, 0.09]	0.578
	Session 2	0.09 ± 0.05	0.01	0.063	11.11	[−0.07, 0.09]	0.675
	Intersession	0.09 ± 0.05	−0.01	0.202	11.11	[−0.07, 0.05]	0.825

Note: : values of the intrasession difference; 95%LOA: 95% limits of agreement; ICC: intraclass correlation coefficient. Asterisk indicates statistical significance.